Disk lock



M. FALK vDIsKILocm Filed Sept. l0, 1928 sept. 3, l19.29.

Patented Sept. 3, 1929.

UNITED Hsfra'rss 1,726,614 PATENT OFFICE.

MORRIS FALK, lOIE' FITCHBURG,. MASSACHUSETTS.

nIsx Loon.

Application led September 10, 1928. Serial No. 304,994.

This invention relates to that type of disk locks in which the plug is provided with several disks normally pressed outwardly by individual springs.

The principal objects of the invention are to provide simple and inexpensive means whereby the disks are preventedl from being forced out of the plug when the plug is re-l moved from the lock and particularly when the plug is shipped and prepared to introduce' into the lock and also to provide a construction in which, in spite of the fact that the disks cannot be accidentally discharged, 'they can be'removed by the Vexercise of care.

`fteference is to be had to the accompanying drawings in which Fig. 1 is a side view of a plug constructedin accordance with this invention showing the disks' 1n position;

liig. 2 is a sectional view'on the line 2-2 of Fig. 1;'

Fig. 3 is a view similar to Fig.` 2 showingf the key in place; and y Fig. 4 is a side view of 'one'of the disks.

l 'A great vdeal of difficulty has been en-` countered by manufacturers, particularly automobile manufacturers, in the handlingy of these disk'vlcks. The disks are springpressedand there is nothing to preventthe springs pressing out and discharging them from the plug when the'plug is notin the lock. These plugs are shipped separately with the disks in place and they have to b e held there by a temporary cylinderplacedover the plug and sometimes they are held the end, the plug being ofuthe ordinary kindv slotted in the. ,usual way. lit is provided with a series of disks 24 in slotsiin the plug,

'each disk being pressedI outwardly. by a,

spring 27.

lin this case a slit .28 is cut in' the disk and' a projecting hook 29 left thereon engages a shoulder 31 in the' slot inthe plug 12 when the spring forces the disk out so as to' hold the disk in' the position shown in Fig. 1. YOn account ofthe,slitv28` and the disk being of resilient material, it is possible to move the diskl over carefully and get it out of the plug in spite of this hook 29. However, that requires some pressure and movement of the parts so that the disks cannot get out of place accidentally. Therefore these plugs vcan be assembled with the disks in them and shipped with no external means for holding the ,disks in position.

This gives the automobile manufacturer the opportunity of having these plugs assembled With no chance' of losing timeby the disks coming out and solves a very importantl problem for him.

Tn Fig. 3 I have shown the key 30 in place showing how it'forces the disk down into the plug and keeps its surfaces within lthe circumference thereof. This is, of course,'the

usual practice.v

Although l have illustrated and described only one form of the invention I am aware of the fact that modifications can be'made ytherein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish -to loe-.limited in this respect but what I do claim is I l. Tn a lock of 'the character described, 'i

the combination with a plug having slots therin and a series of spring pressed disks in the slots, each disk having yielding but integral means at the side thereof for preventing'itsfaccidental removal, and for perj mitting intentional removal.

2. In a lock of the character described, the combination with a plug having slots therei and a seriesof spring pressed disks in th slots, each disk having a yieldingintegral -hook extending from one edge for engaging a shoulder in the slot to prevent the acciting intentional removal. i

3. The combination with' ay plug for a lock, said plug having a disk slot therein, of a disk in said slot, the'slot having a ldental removal ofthe disk," and for permitl shoulder and the disk being provided with an outward projection adapted .to engage the shoulder when the disk is pushed out and a spring for engaging the disk on the other side andpushing!v the projectionagainst the shoulder. j

4. TheV combination with'A a plug for a j lock, said plug having disk slots therein, of

ldisks in said-slots, the slots" having each a` shoulder and .the disks being provided with a yielding integral-hookadapted'to engage the shoulders when the disks are pushed out and springs for engaging the disks and pushing the hooks against the shoulders.

' 5. As an article of manufacture, a disk 5 tumbler for a lock having parallel lateral sides and provided with a shoulder on one side for engagement by a spring-and a yielding hook on the other sideand near the opposite end, the disk having a portion extending across it at the bottom but having a slit 10 entirely through it under said hook, leaving the hook free at the bottom;

In testimony whereof I have hereunto affixed my signature.

MORRIS FALK. 

